decimal比较大小
//前提为a、b均不能为nullif(a.compareTo(b) == -1){System.out.println(“a小于b”);}if(a.compareTo(b) == 0){System.out.println(“a等于b”);}if(a.compareTo(b) == 1){System.out.println(“a大于b”);}if(a.compareTo(b) > -1){
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//前提为a、b均不能为null
if(a.compareTo(b) == -1){
System.out.println(“a小于b”);
}
if(a.compareTo(b) == 0){
System.out.println(“a等于b”);
}
if(a.compareTo(b) == 1){
System.out.println(“a大于b”);
}
if(a.compareTo(b) > -1){
System.out.println(“a大于等于b”);
}
if(a.compareTo(b) < 1){
System.out.println(“a小于等于b”);
}
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