java.lang.Math.ceil()方法的使用及代码示例
本文整理了Java中java.lang.Math.ceil()方法的一些代码示例，展示了Math.ceil()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Math.ceil()方法的具体详情如下：
包路径：java.lang.Math
类名称：Math
方法名：ceil
Math.ceil介绍
[英]Returns the double conversion of the most negative (closest to negative infinity) integer value greater than or equal to the argument.
Special cases:
- ceil(+0.0) = +0.0
- ceil(-0.0) = -0.0
- ceil((anything in range (-1,0)) = -0.0
- ceil(+infinity) = +infinity
- ceil(-infinity) = -infinity
- ceil(NaN) = NaN
[中]返回大于或等于参数的最负（最接近负无穷大）整数值的双重转换。
特殊情况：
*ceil（+0.0）=+0.0
*ceil（-0.0）=-0.0
*ceil（（范围（-1,0）内的任何内容）=-0.0
*ceil（+无穷大）=+无穷大
*ceil（-无穷大）=-无穷大
*ceil（NaN）=NaN
代码示例
代码示例来源：origin: stackoverflow.com
value = 5.5
Math.floor(value) // 5
Math.ceil(value) // 6
Math.round(value) // 6
Math.trunc(value) // 5
parseInt(value) // 5
~~value // 5
value | 0 // 5
value >> 0 // 5
value >>> 0 // 5
value - value % 1 // 5代码示例来源：origin: stackoverflow.com
value = Number.MAX_SAFE_INTEGER/10 * -1 // -900719925474099.1
Math.floor(value) // -900719925474100
Math.ceil(value) // -900719925474099
Math.round(value) // -900719925474099
Math.trunc(value) // -900719925474099
parseInt(value) // -900719925474099
value | 0 // -858993459
~~value // -858993459
value >> 0 // -858993459
value >>> 0 // 3435973837
value - value % 1 // -900719925474099代码示例来源：origin: stackoverflow.com
value = -5.5
Math.floor(value) // -6
Math.ceil(value) // -5
Math.round(value) // -5
Math.trunc(value) // -5
parseInt(value) // -5
value | 0 // -5
~~value // -5
value >> 0 // -5
value >>> 0 // 4294967291
value - value % 1 // -5代码示例来源：origin: stackoverflow.com
var intvalue = Math.floor( floatvalue );
var intvalue = Math.ceil( floatvalue );
var intvalue = Math.round( floatvalue );
// `Math.trunc` was added in ECMAScript 6
var intvalue = Math.trunc( floatvalue );代码示例来源：origin: stackoverflow.com
value = Number.MAX_SAFE_INTEGER/10 // 900719925474099.1
Math.floor(value) // 900719925474099
Math.ceil(value) // 900719925474100
Math.round(value) // 900719925474099
Math.trunc(value) // 900719925474099
parseInt(value) // 900719925474099
value | 0 // 858993459
~~value // 858993459
value >> 0 // 858993459
value >>> 0 // 858993459
value - value % 1 // 900719925474099代码示例来源：origin: spring-projects/spring-framework
int calculateCapacity(CharSequence sequence, Charset charset) {
float maxBytesPerChar = this.charsetToMaxBytesPerChar
.computeIfAbsent(charset, cs -> cs.newEncoder().maxBytesPerChar());
float maxBytesForSequence = sequence.length() * maxBytesPerChar;
return (int) Math.ceil(maxBytesForSequence);
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: libgdx/libgdx
/** Increases the size of the backing array to accommodate the specified number of additional items. Useful before adding many
* items to avoid multiple backing array resizes. */
public void ensureCapacity (int additionalCapacity) {
if (additionalCapacity < 0) throw new IllegalArgumentException("additionalCapacity must be >= 0: " + additionalCapacity);
int sizeNeeded = size + additionalCapacity;
if (sizeNeeded >= threshold) resize(MathUtils.nextPowerOfTwo((int)Math.ceil(sizeNeeded / loadFactor)));
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return the time to live for this object in seconds.
* Rounds up eagerly, e.g. 9.00001 still to 10.
* @return number of seconds until expiration
* @throws TransactionTimedOutException if the deadline has already been reached
*/
public int getTimeToLiveInSeconds() {
double diff = ((double) getTimeToLiveInMillis()) / 1000;
int secs = (int) Math.ceil(diff);
checkTransactionTimeout(secs <= 0);
return secs;
}内容来源于网络，如有侵权，请联系作者删除！
